The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. Which, if any, of the following actions will decrease the concentration of CO₂ gas present at equilibrium?

Question

Quizplus · Accepted Answer

According to Le Chatelier's principle, a decrease in temperature will favor the exothermic reaction, which will lead to a shift towards the products. As CO₂ is a product in this reaction, decreasing the temperature will decrease the concentration of this gas present at equilibrium. Therefore, option D is the correct choice. Adding more N₂ gas (option A) or increasing the volume (option C) will have no effect on the concentration of the gases at equilibrium. Adding more solid NaOH (option B) will increase the concentration of the OH- ion, but it will not affect the concentration of CO₂ gas. Thus, the best choice is option D (lowering the temperature).

The Following Reaction Is at Equilibrium at a Pressure of 1